login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A187236 as a simple table

na(n)
10
20
30
40
51
68
7138
83459
9137912
108735904
11903185866
12159235673397
1350091451190693

[0,0,0,0,1,8,138,3459,137912,8735904,903185866,
 159235673397,50091451190693]